Window portion of a stampless envelope



The FIGURE is a front elevational view portion of a stampless envelope showing our new design, the remaining portions of the envelope including additional windows being shown for environmental purposes only and forming no part of the claimed design.

The broken lines defining the boundries, and the FIM code within the claimed are in the FIGURE are shown for illustrative purposes only and form no part of the claimed design. 

The ornamental design for a window portion of a stampless envelope, as shown and described. 